/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

using System.Runtime.Serialization;
using Nest.Utf8Json;

namespace Nest
{
	[InterfaceDataContract]
	[JsonFormatter(typeof(FieldNameQueryFormatter<SpanTermQuery, ISpanTermQuery>))]
	public interface ISpanTermQuery : ISpanSubQuery, IFieldNameQuery
	{
		[DataMember(Name = "value")]
		[JsonFormatter(typeof(SourceWriteFormatter<object>))]
		object Value { get; set; }
	}

	[DataContract]
	public class SpanTermQuery : FieldNameQueryBase, ISpanTermQuery
	{
		public object Value { get; set; }
		
		protected override bool Conditionless => IsConditionless(this);

		internal override void InternalWrapInContainer(IQueryContainer c) => c.SpanTerm = this;

		internal static bool IsConditionless(ISpanTermQuery q) => q.Value == null || q.Value.ToString().IsNullOrEmpty() || q.Field.IsConditionless();
	}

	public class SpanTermQueryDescriptor<T> : FieldNameQueryDescriptorBase<SpanTermQueryDescriptor<T>, ISpanTermQuery, T>, ISpanTermQuery
		where T : class
	{
		protected override bool Conditionless => SpanTermQuery.IsConditionless(this);
		
		object ISpanTermQuery.Value { get; set; }

		public SpanTermQueryDescriptor<T> Value(object value) =>
			Assign(value, (a, v) => a.Value = v);
	}
}
